/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInstance.h
Get all of the textures in the expression chain for the given property (ie fill in the given array with all textures in the chain).
bool true if successful, false if not.
virtual bool GetTexturesInPropertyChain ( EMaterialProperty InProperty, [TArray](API\Runtime\Core\Containers\TArray)< [UTexture](API\Runtime\Engine\Engine\UTexture) * > & OutTextures, [TArray](API\Runtime\Core\Containers\TArray)< [FName](API\Runtime\Core\UObject\FName) > * OutTextureParamNames, struct [FStaticParameterSet](API\Runtime\Engine\FStaticParameterSet) * InStaticParameterSet, [ERHIFeatureLevel::Type](API\Runtime\RHI\ERHIFeatureLevel__Type) InFeatureLevel, [EMaterialQualityLevel::Type](API\Runtime\Engine\EMaterialQualityLevel__Type) InQuality )